class FieldStorageConfigStorage

class FieldStorageConfigStorage extends ConfigEntityStorage {
    
    /**
     * The module handler.
     *
     * @var \Drupal\Core\Extension\ModuleHandlerInterface
     */
    protected $moduleHandler;
    
    /**
     * The entity type manager.
     *
     * @var \Drupal\Core\Entity\EntityTypeManagerInterface
     */
    protected $entityTypeManager;
    
    /**
     * The field type plugin manager.
     *
     * @var \Drupal\Core\Field\FieldTypePluginManagerInterface
     */
    protected $fieldTypeManager;
    
    /**
     * The deleted fields repository.
     *
     * @var \Drupal\Core\Field\DeletedFieldsRepositoryInterface
     */
    protected $deletedFieldsRepository;
    
    /**
     * Constructs a FieldStorageConfigStorage object.
     *
     * @param \Drupal\Core\Entity\EntityTypeInterface $entity_type
     *   The entity type definition.
     * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
     *   The config factory service.
     * @param \Drupal\Component\Uuid\UuidInterface $uuid_service
     *   The UUID service.
     * @param \Drupal\Core\Language\LanguageManagerInterface $language_manager
     *   The language manager.
     * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
     *   The entity type manager.
     * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
     *   The module handler.
     * @param \Drupal\Core\Field\FieldTypePluginManagerInterface $field_type_manager
     *   The field type plugin manager.
     * @param \Drupal\Core\Field\DeletedFieldsRepositoryInterface $deleted_fields_repository
     *   The deleted fields repository.
     * @param \Drupal\Core\Cache\MemoryCache\MemoryCacheInterface $memory_cache
     *   The memory cache.
     */
    public function __construct(EntityTypeInterface $entity_type, ConfigFactoryInterface $config_factory, UuidInterface $uuid_service, LanguageManagerInterface $language_manager, EntityTypeManagerInterface $entity_type_manager, ModuleHandlerInterface $module_handler, FieldTypePluginManagerInterface $field_type_manager, DeletedFieldsRepositoryInterface $deleted_fields_repository, MemoryCacheInterface $memory_cache) {
        parent::__construct($entity_type, $config_factory, $uuid_service, $language_manager, $memory_cache);
        $this->entityTypeManager = $entity_type_manager;
        $this->moduleHandler = $module_handler;
        $this->fieldTypeManager = $field_type_manager;
        $this->deletedFieldsRepository = $deleted_fields_repository;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function createInstance(ContainerInterface $container, EntityTypeInterface $entity_type) {
        return new static($entity_type, $container->get('config.factory'), $container->get('uuid'), $container->get('language_manager'), $container->get('entity_type.manager'), $container->get('module_handler'), $container->get('plugin.manager.field.field_type'), $container->get('entity_field.deleted_fields_repository'), $container->get('entity.memory_cache'));
    }
    
    /**
     * {@inheritdoc}
     */
    public function loadByProperties(array $conditions = []) {
        // Include deleted fields if specified in the $conditions parameters.
        $include_deleted = $conditions['include_deleted'] ?? FALSE;
        unset($conditions['include_deleted']);
        
        /** @var \Drupal\field\FieldStorageConfigInterface[] $storages */
        $storages = [];
        // Get field storages living in configuration. If we are explicitly looking
        // for deleted storages only, this can be skipped, because they will be
        // retrieved from the deleted fields repository below.
        if (empty($conditions['deleted'])) {
            if (isset($conditions['entity_type']) && isset($conditions['field_name'])) {
                // Optimize for the most frequent case where we do have a specific ID.
                $id = $conditions['entity_type'] . '.' . $conditions['field_name'];
                $storages = $this->loadMultiple([
                    $id,
                ]);
            }
            else {
                // No specific ID, we need to examine all existing storages.
                $storages = $this->loadMultiple();
            }
        }
        // Merge deleted field storage definitions from the deleted fields
        // repository if needed.
        if ($include_deleted || !empty($conditions['deleted'])) {
            $deleted_storage_definitions = $this->deletedFieldsRepository
                ->getFieldStorageDefinitions();
            foreach ($deleted_storage_definitions as $id => $field_storage_definition) {
                if ($field_storage_definition instanceof FieldStorageConfigInterface) {
                    $storages[$id] = $field_storage_definition;
                }
            }
        }
        // Collect matching fields.
        $matches = [];
        foreach ($storages as $field) {
            foreach ($conditions as $key => $value) {
                // Extract the actual value against which the condition is checked.
                $checked_value = $field->get($key);
                // Skip to the next field as soon as one condition does not match.
                if ($checked_value != $value) {
                    continue 2;
                }
            }
            // When returning deleted fields, key the results by UUID since they can
            // include several fields with the same ID.
            $key = $include_deleted ? $field->uuid() : $field->id();
            $matches[$key] = $field;
        }
        return $matches;
    }
    
    /**
     * {@inheritdoc}
     */
    protected function mapFromStorageRecords(array $records) {
        foreach ($records as $id => &$record) {
            try {
                $class = $this->fieldTypeManager
                    ->getPluginClass($record['type']);
            } catch (PluginNotFoundException $e) {
                $config_id = $this->getPrefix() . $id;
                throw new PluginNotFoundException($record['type'], "Unable to determine class for field type '{$record['type']}' found in the '{$config_id}' configuration", $e->getCode(), $e);
            }
            $record['settings'] = $class::storageSettingsFromConfigData($record['settings']);
        }
        return parent::mapFromStorageRecords($records);
    }
    
    /**
     * {@inheritdoc}
     */
    protected function mapToStorageRecord(EntityInterface $entity) {
        $record = parent::mapToStorageRecord($entity);
        $class = $this->fieldTypeManager
            ->getPluginClass($record['type']);
        $record['settings'] = $class::storageSettingsToConfigData($record['settings']);
        return $record;
    }

}